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INDUSTRY SAFETY AND LABOUR PROTECTION
ArticleName Integrated technology for multistage drainage of coal seams before high-rate cutting
DOI 10.17580/gzh.2021.02.14
ArticleAuthor Slastunov S. V., Ponizov A. V., Sadov A. P., Khautiev A. B.-M.
ArticleAuthorData

NUST MISIS College of Mining, Moscow, Russia:

S. V. Slastunov, Professor, Doctor of Engineering Sciences, slastunovsv@mail.ru

 

SUEK-Kuzbass, Leninsk-Kuznetsky, Russia:

A. V. Ponizov, Director of Production (Preliminary Works)
A. P. Sadov, Director of Methane Drainage and Management, Candidate of Engineering Sciences
A. B.-M. Khautiev, Production Engineer at Methane Drainage and Management, Candidate of Engineering Sciences

Abstract

An increase in the depth of underground coal mining leads to an increase in gas content, to a decrease in gas permeability, and, as a result, to a decrease in the mine drainage efficiency. The article presents the actual data on implementation of the integrated multistage pre-mine drainage technology using surface and underground boreholes in Kirov Mine of SUEK-Kuzbass. The actual estimate of the improved underground hydraulic fracturing efficiency is made by a number of objective factors identified during underground coal production in the hydraulic fracturing zones and in the check zones. These objective factors are the increase in output per face, decrease in methane emission in longwalls and the reduction in downtime of mining equipment by gas criterion. The study results on the effective parameters of the underground fracturing technology are presented, namely, the fluid injection rate, effective (useful) length of fracturing wells and the fluid injection volume. The article gives the actual data on hydraulic impact exerted on a coal seam unloaded from rock pressure using surface boreholes. It is shown that the main impact mode is hydraulic splitting, sometimes with microhydrofractures created at high rates of fluid injection into the coal seam. The prospects of further improvement in hydraulic coal splitting from ground surface are based on implementation of selfsustaining coal destruction and on using the effect of coal swelling in the process zone.
The authors appreciate participation of A. V. Malafeev, I. A. Kurmanov, E. A. Kvitko, V. I. Gavrilov, I. A. Komissarov, S. L. Demin, A. B. Letashkov, I. V. Chaldin and other experts from SUEK-Kuzbass in the preparation and implementation of the tests.

keywords Unloaded coal seams, pre-mine drainage, mutlistage drainage, integrated technology, hydraulic splitting from ground surface, underground hydraulic fracturing, effective parameters
References

1. Yutyaev E. P. Justification of underground mining technology for coal seams with high gas content : Dissertation … of Doctor of Engineering Sciences. Kemerovo, 2019. 465 p.
2. Yutyaev E. P., Sadov A. P., Meshkov A. A., Khautiev A. M., Taylakov O. V., Utkaev E. A. Evaluation of coal filtration properties in the hydrodynamic tests of degassing formation wells. Ugol. 2017. No. 11. pp. 24–29.
3. Karkashadze G. G., Mazanik E. V., Pashchenkov P. N. Results of determining reservoir pressure, permeability and sorption parameters of coal seam mining on results of measurements of methane flux from short wells. GIAB. 2016. No. 9. pp. 259–264.
4. Pashchenkov P. N. Method to determine parameters of Langmuir isotherm and gas permeability of dispersed coal particles. GIAB. 2018. No. 3. pp. 120–128.
5. Kurlenya M. V., Serdyukov S. V., Shilova T. V., Patutin A. V. Procedure and equipment for sealing coal bed methane drainage holes by barrier shielding. Journal of Mining Science. 2014. Vol. 50, Iss. 5. pp. 994–1000.

6. Hu C., Wu D. A novel gas drainage technology for lower protected coal seams: Application and verification in xinzhuangzi coal mine, huainan coalfield. IPPTA: Quarterly Journal of Indian Pulp and Paper Technical Association. 2018. Vol. 30, No. 7. pp. 801–808.
7. Zhang Li, Zhang Hui, Guo Hao. A case study of gas drainage to low permeability coal seam. International Journal of Mining Science and Technology. 2017. Vol. 27, Iss. 4. pp. 687–692.
8. Szott W., Słota-Valim M., Gołąbek A., Sowiżdżał K. Numerical studies of improved methane drainage technologies by stimulating coal seams in multi-seam mining layouts. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 108. pp. 157–168.
9. Joseph J., Kuntikana G., Singh D. N. Investigations on gas permeability in porous media. Journal of Natural Gas Science and Engineering. 2019. Vol. 64. pp. 81–92.
10. Guidace for coal mines degassing. Issue 22. Series 05. Documents for safety, inspection and permitting activities in coal industry. Moscow : NTTs PB, 2012. 250 p.
11. Temporal guide on pneumatic and hydraulic pretreatment of coal fields using surface boreholes. Moscow : MGI, 1991. 92 p.
12. Slastunov S. V., Yutyaev E. P., Mazanik E. V., Ermak G. P. Efficiency of improved underground hydraulic fracturing in coalbed degassing. Gornyi Zhurnal. 2018. No. 1. pp. 83–87. DOI: 10.17580/gzh.2018.01.15
13. Slastunov S. V., Karkashadze G. G., Kolikov K. S. et al. Method of preparation of gas curved coating plate for processing. Patent RF, No. 2659298. Applied: 22.09.2017. Published: 29.06.2018. Bulletin No. 19.
14. Slastunov S. V., Meshkov A. A., Mazanik E. V., Komissarov I. A. Breakdown fluid injection modes in underground hydraulic fracturing. GIAB. 2018. No. 10. pp. 110–117.
15. Sadov A. P. Improvement of coal drainage efficiency by cyclic hydraulic impacts on coal seams : Dissertation … of Candidate of Engineering Sciences. Moscow, 2017. 235 p.

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